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USGS 11303500 SAN JOAQUIN R NR VERNALIS CA

  Stream Site

DESCRIPTION:
Latitude 37°40'34",   Longitude 121°15'55"   NAD27
San Joaquin County, California, Hydrologic Unit 18040003
Drainage area: 13,539 square miles
Datum of gage: 2.57 feet above   NAVD88.
AVAILABLE DATA:
Data Type Begin Date End Date Count
 Current / Historical Observations     (availability statement)    1986-11-30  2025-10-28  
 Daily Data
    Temperature, water, degrees Celsius  1961-10-27  2023-05-10  43091 
    Discharge, cubic feet per second  1923-10-01  2025-10-27  35456 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1985-10-10  2005-09-06  12896 
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU) -- TS032: FTS DTS-12  2014-09-30  2016-08-18  1356 
    Suspended sediment concentration, milligrams per liter  1956-11-01  2023-09-30  23904 
    Suspended sediment discharge, short tons per day  1956-11-01  2023-09-30  24437 
 Daily Statistics 
    Temperature, water, degrees Celsius  1972-12-04  2023-05-10 7054 
    Discharge, cubic feet per second  1923-10-01  2025-03-30 35245 
    Suspended sediment concentration, milligrams per liter  1956-11-01  2023-09-29 23903 
    Suspended sediment discharge, short tons per day  1956-11-01  2023-09-29 24436 
 Monthly Statistics 
    Temperature, water, degrees Celsius  1972-12  2023-05  
    Discharge, cubic feet per second  1923-10  2025-03  
    Suspended sediment concentration, milligrams per liter  1956-11  2023-09  
    Suspended sediment discharge, short tons per day  1956-11  2023-09  
 Annual Statistics 
    Temperature, water, degrees Celsius  1973  2023  
    Discharge, cubic feet per second  1924  2025  
    Suspended sediment concentration, milligrams per liter  1957  2023  
    Suspended sediment discharge, short tons per day  1957  2023  
 Peak streamflow 1923-10-15  2024-03-06  96 
 Field measurements 1988-09-19  2025-09-04  469 
 Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP) 1950-12-02  2024-02-07  10183 
 Water-Year Summary 2005  2024  20 
 Revisions  Loading...
OPERATION:
Record for this site is maintained by the USGS California Water Science Center
Email questions about this site to California Water Science Center Water-Data Inquiries